# QuantaFlow x402 API Gateway – Alchemy Sonic Mainnet

> QuantaFlow x402 API Gateway – Alchemy Sonic Mainnet is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-21).

Proxies requests to the Alchemy Sonic mainnet RPC/API endpoint via the x402 micropayment protocol, charging $0.01 USDC per call

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/alchemy-sonic-mainnet?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-x402-api-gateway-alchemy-sonic-mainnet-6744421a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EZ5u3M-wQA5EcL9mEt8lU

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability quantaflow-x402-api-gateway-alchemy-sonic-mainnet-6744421a -d '<json body>'
```

Example prompt: Query the Sonic mainnet via the QuantaFlow gateway — call the Alchemy Sonic mainnet endpoint at path '/v2/eth_blockNumber' using GET to get the latest block number, paying the per-request fee automatically.

## When to prefer this

Choose this endpoint when you need pay-per-call access to Alchemy's Sonic mainnet RPC without managing an Alchemy API subscription or key — ideal for low-volume or agent-driven on-demand blockchain queries where micropayment via x402 is acceptable and no long-term API plan is warranted.

## Known failure modes

- Payment not provided or insufficient USDC balance returns 402 Payment Required
- Invalid or malformed path results in upstream 404 or error passthrough
- Alchemy Sonic mainnet node downtime causes upstream 5xx errors passed through
- Invalid JSON body causes upstream parse error
- Unsupported HTTP method may be rejected upstream

## How this service works

Every request, a quantum of value. x402 protocol-based payment endpoint for web3/DeFi tools.

## Output

The raw upstream response body from the Alchemy Sonic mainnet API, passed through transparently along with its content type, after the $0.01 USDC x402 micropayment is confirmed.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "body": {
   "type": "string",
   "description": "Optional JSON body forwarded to POST requests."
  },
  "path": {
   "type": "string",
   "description": "Path below the selected upstream origin."
  },
  "query": {
   "type": "object"
  },
  "method": {
   "enum": [
    "GET",
    "POST"
   ],
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "description": "The upstream response body and content type are passed through after successful payment."
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/quantaflow-x402-api-gateway-alchemy-sonic-mainnet-6744421a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from quanta-roan.vercel.app](https://www.zero.xyz/host/quanta-roan.vercel.app/llms.txt)